Must I reboot after installing software when I know I need to install a 2nd package that requires reboot?

"It shouldn't be necessary to reboot between the two installations, unless there is a dependency in the first installation (.dll, config file, et al) that is required as part of the second package's installer, or if the second package requires services from the first package to be running.

Kind of a terse response, but that's essentially the crux of it."

"Basically it is the way JMD said.

As for a concrete recommendation: better safe than sorry. I always reboot in between, preferring a few lost minutes to a maybe much longer time of ""suffering"" afterwards, especially because it may not be clear that there are problems immediately after the reboot."